212222011021 has 8 divisors (see below), whose sum is σ = 216502939800. Its totient is φ = 207966949440.

The previous prime is 212222011003. The next prime is 212222011031. The reversal of 212222011021 is 120110222212.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 589809796 + 211632201225 = 24286^2 + 460035^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 212222011021 - 2⁵ = 212222010989 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212222010986 and 212222011004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212222011031) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6450226 + ... + 6483043.

It is an arithmetic number, because the mean of its divisors is an integer number (27062867475).

Almost surely, 2^212222011021 is an apocalyptic number.

It is an amenable number.

212222011021 is a deficient number, since it is larger than the sum of its proper divisors (4280928779).

212222011021 is a wasteful number, since it uses less digits than its factorization.

212222011021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12933599.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 212222011021 its reverse (120110222212), we get a palindrome (332332233233).

The spelling of 212222011021 in words is "two hundred twelve billion, two hundred twenty-two million, eleven thousand, twenty-one".